ft_strnstr.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strnstr.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: phelebra <xhelp00@gmail.com>               +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/01/10 17:06:51 by phelebra          #+#    #+#             */
/*   Updated: 2023/01/17 14:08:19 by phelebra         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

char	*ft_strnstr(const char *haystack, const char *needle, size_t n)
{
	size_t	i;
	size_t	j;

	if (!haystack && n == 0)
		return (0);
	if (needle[0] == '\0')
		return ((char *)haystack);
	i = 0;
	while (haystack[i] != '\0' && i < n)
	{
		j = 0;
		while (haystack[i + j] != '\0' && haystack [i + j] == needle[j]
			&& i + j < n)
		{
			if (needle[j + 1] == '\0')
			{
				return ((char *) haystack + i);
			}
			j++;
		}
		i++;
	}
	return (0);
}